Diseases and associated fungal pathogens of mulberry nurseries
2002
and H.V. RAJU, V.P. GUPTA, GOVINDAIAH
Various diseases, e.g. stem-canker, cutting rot, collar rot, sprout/leaf blight, die-back and root rot, were observed in mulberry (Morus alba) nurseries in Karnataka and Andhra Pradesh, India. These diseases affected initial establishment of mulberry by causing mortality of stem-cuttings and death of saplings. On isolation and identification, Botryodiplodia theobromae, Fusarium solani, Phoma sorghina, F. pallidoroseum and Colletotrichum gloeosporioides [Glomerella cingulata] were identified as causal pathogens of these diseases. Amongst these, B. theobromae was found to be highly virulent causing 44.4% mortality of cuttings (cv. Kanva 2) when inoculated to the soil and caused 51.4 to 61.1% mortality when inoculated in combination with F. solani and/or P. sorghina. B. theobromae also infected the foliage of saplings (50-60% saplings killed), causing die-back disease.
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